Squashed commit of the following:

commit 2773518369433b4e6f19a7c972c894cb95e490b3
Author: nakaya <nakaya@azia.co.jp>
Date:   Tue Jan 15 12:36:01 2013 +0900

    modified on topic(3)

commit 1ab9856def00170442220f3f359d0980b6147610
Author: nakaya <nakaya@azia.co.jp>
Date:   Tue Jan 15 12:35:24 2013 +0900

    modified on topic (2)

commit 22fe7f2f65cd39ab00cc7ec6649aa5c0208860a4
Author: nakaya <nakaya@azia.co.jp>
Date:   Tue Jan 15 12:34:10 2013 +0900

    modified on topic